The resistance of a thin wire is greater than the resistance of a thick wire because a thin wire has fewer electrons to carry the current. The relationship between resistance and the area of the cross section of a wire is inversely proportional .
How does length affect resistance?
First, the total length of the wires will affect the amount of resistance. The longer the wire, the more resistance that there will be. ... More collisions mean more resistance. Second, the cross-sectional area of the wires will affect the amount of resistance.
Which length of wire offers the greatest resistance?
A short wire has a lower resistance than a long one*. Resistance is directly proportional to the length of the path through which current flows: R ∝ L. This means the longer the wire, the more resistance.
Why does resistance increase with length?
This can be simply explained as below. when you have longer length of wire, the current has to travel more distance, more the distance higher the number of obstacles it faces through its path . Therefore resistance increases with the length.
How does the resistance of a wire depend on its length?
Resistance is directly proportional to the length of the conductor . So, as the length increases, the magnitude of resistance increases. ... Resistance is inversely proportional to the cross-sectional area of the conductor. Thus, the resistance of the conductor decreased with the decrease in cross-sectional area.
What are the four things that affect the resistance of a wire?
- The type of material of which the resistor is made.
- The length of the resistor.
- The thickness of the resistor.
- The temperature of the conductor.
What type of wire has the least resistance?
Pure silver is the best conductor of electricity, then copper, and then aluminum. Silver is the best conductor because it has the least resistance to the flow of electricity. According to Ohm’s Law, current is equal to voltage divided by resistance.
Is length directly proportional to resistance?
For a given material, resistance and length formula clearly speaks that the resistance is directly proportional to its length . When the length of the material is increased, its value of resistance also increases. When the length of the material decreases, its value of resistance will also decrease.
What happens to resistance if length is doubled?
So, the new resistance, after doubling the length of the wire, becomes twice of the original resistance . Hence, if the length of a wire is doubled, then its resistance becomes doubled.
Why the resistance is directly proportional to length?
As the length increases , the number of collisions by the moving free electrons with the fixed positive ions increases as more number of fixed positive ions are present in an increased length of the conductor. As a result, resistance increases.
What happens to resistance when the length of the wire increases?
When electrons start to move, they get scattered from the nuclei present in the material which is the wire made from. This process creates the resistance. Thus, when the length of the wire increases, the amount of particles scattered from the nuclei increases which also increases the resistance.
Does resistance increase with diameter?
Resistance is inversely proportional to cross sectional area . So if the diameter is halved the cross-sectional area is quartered and the resistance is quadrupled.
What happens to the resistance if we increase the length of conductor?
the resistance of a conductor is directly proportional to its length. so if length is increased then resistivity increases ande vice versa . so if length is doubled resistance will also get doubled i.e resistance is 4 times that of original resistance.
Does resistivity depend on length and area?
Resistivity is a property of the material, resistance depends on the size and shape. ... It depends on resistivity but also on the length and cross sectional area of the material in question (so it depends on the total number of electrons and how long of a distance they need to traverse).
How does the temperature of a wire affect resistance?
Heating a metal conductor makes it more difficult for electricity to flow through it. These collisions cause resistance and generate heat. ... Heating the metal conductor causes atoms to vibrate more, which in turn makes it more difficult for the electrons to flow, increasing resistance.
What is the difference between a resistor and resistance?
Resistance is the property of a conductor, which determines the quantity of current that passes through it when a potential difference is applied across it. A resistor is a electrical componet with a predetermined electrical resistance, like 1 ohm, 10 ohms 100 ohms 10000 ohms etc.
